2020-03-08 07:05:49

by Anson Huang

Subject: [PATCH] arm64: dts: imx8mn: Add CPU thermal zone support

i.MX8MN shares same thermal sensor with i.MX8MM, add thermal zone
support for i.MX8MN.

Signed-off-by: Anson Huang <[email protected]>
---
arch/arm64/boot/dts/freescale/imx8mn.dtsi | 44 +++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index f277572..88eeb52 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -7,6 +7,7 @@
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/thermal/thermal.h>

#include "imx8mn-pinfunc.h"

@@ -67,6 +68,7 @@
nvmem-cells = <&cpu_speed_grade>;
nvmem-cell-names = "speed_grade";
cpu-idle-states = <&cpu_pd_wait>;
+ #cooling-cells = <2>;
};

A53_1: cpu@1 {
@@ -79,6 +81,7 @@
next-level-cache = <&A53_L2>;
operating-points-v2 = <&a53_opp_table>;
cpu-idle-states = <&cpu_pd_wait>;
+ #cooling-cells = <2>;
};

A53_2: cpu@2 {
@@ -91,6 +94,7 @@
next-level-cache = <&A53_L2>;
operating-points-v2 = <&a53_opp_table>;
cpu-idle-states = <&cpu_pd_wait>;
+ #cooling-cells = <2>;
};

A53_3: cpu@3 {
@@ -103,6 +107,7 @@
next-level-cache = <&A53_L2>;
operating-points-v2 = <&a53_opp_table>;
cpu-idle-states = <&cpu_pd_wait>;
+ #cooling-cells = <2>;
};

A53_L2: l2-cache0 {
@@ -186,6 +191,38 @@
method = "smc";
};

+ thermal-zones {
+ cpu-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <2000>;
+ thermal-sensors = <&tmu>;
+ trips {
+ cpu_alert0: trip0 {
+ temperature = <85000>;
+ hysteresis = <2000>;
+ type = "passive";
+ };
+
+ cpu_crit0: trip1 {
+ temperature = <95000>;
+ hysteresis = <2000>;
+ type = "critical";
+ };
+ };
+
+ cooling-maps {
+ map0 {
+ trip = <&cpu_alert0>;
+ cooling-device =
+ <&A53_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+ <&A53_1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+ <&A53_2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+ <&A53_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+ };
+ };
+ };
+ };
+
timer {
compatible = "arm,armv8-timer";
interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(6) | IRQ_TYPE_LEVEL_LOW)>,
@@ -274,6 +311,13 @@
gpio-ranges = <&iomuxc 0 119 30>;
};

+ tmu: tmu@30260000 {
+ compatible = "fsl,imx8mn-tmu", "fsl,imx8mm-tmu";
+ reg = <0x30260000 0x10000>;
+ clocks = <&clk IMX8MN_CLK_TMU_ROOT>;
+ #thermal-sensor-cells = <0>;
+ };
+
wdog1: watchdog@30280000 {
compatible = "fsl,imx8mn-wdt", "fsl,imx21-wdt";
reg = <0x30280000 0x10000>;
--
2.7.4

2020-03-16 00:48:14

by Shawn Guo

Subject: Re: [PATCH] arm64: dts: imx8mn: Add CPU thermal zone support

On Sun, Mar 08, 2020 at 02:58:41PM +0800, Anson Huang wrote:
> i.MX8MN shares same thermal sensor with i.MX8MM, add thermal zone
> support for i.MX8MN.
>
> Signed-off-by: Anson Huang <[email protected]>

Applied, thanks.